Śrīmad-Bhāgavatam · Text 10.2.41
Who is speaking and story frame
दिष्टयाम्ब ते कुक्षिगत: पर: पुमा-
नंशेन साक्षाद् भगवान् भवाय न: ।
माभूद् भयं भोजपतेर्मुमूर्षो-
र्गोप्ता यदूनां भविता तवात्मज: ॥ ४१ ॥
diṣṭyāmba te kukṣi-gataḥ paraḥ pumān
aṁśena sākṣād bhagavān bhavāya naḥ
mābhūd bhayaṁ bhoja-pater mumūrṣor
goptā yadūnāṁ bhavitā tavātmajaḥ
O mother Devakī, by your good fortune and ours, the Supreme Personality of Godhead Himself, with all His plenary portions, such as Baladeva, is now within your womb. Therefore you need not fear Kaṁsa, who has decided to be killed by the Lord. Your eternal son, Kṛṣṇa, will be the protector of the entire Yadu dynasty.
Read Śrīla Prabhupāda's purport on Vedabase.io